Patents by Inventor Anil Sethy

Anil Sethy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of pre-treating woodchips prior to mechanical pulping
    Patent number: 7943008
    Abstract: A method of making pulp adapted to be used in forming corrugating medium is disclosed. The method comprises cooking woodchips in a first liquor in the absence of an alkali addition. The method further comprises mechanically fiberizing the woodchips to form a pulp. The method further comprises separating hydrolyzate from the pulp. The method further comprises treating the pulp with a second liquor, the second liquor including at least one alkali. The method further comprises refining the pulp.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: May 17, 2011
    Assignee: Packaging Corporation of America
    Inventors: Ventzislav H. Kirov, Anil Sethy, Bryan L. Sorensen
  • METHOD OF PRE-TREATING WOODCHIPS PRIOR TO MECHANICAL PULPING
    Publication number: 20100276092
    Abstract: A method of making pulp adapted to be used in forming corrugating medium is disclosed. The method comprises cooking woodchips in a first liquor in the absence of an alkali addition. The method further comprises mechanically fiberizing the woodchips to form a pulp. The method further comprises separating hydrolyzate from the pulp. The method further comprises treating the pulp with a second liquor, the second liquor including at least one alkali. The method further comprises refining the pulp.
    Type: Application
    Filed: July 12, 2010
    Publication date: November 4, 2010
    Inventors: Ventzislav H. Kirov, Anil Sethy, Bryan L. Sorensen
  • Method of pre-treating woodchips prior to mechanical pulping
    Patent number: 7771565
    Abstract: A method of making pulp adapted to be used in forming corrugating medium is disclosed. The method comprises cooking woodchips in a first liquor in the absence of an alkali addition. The method further comprises mechanically fiberizing the woodchips to form a pulp. The method further comprises separating hydrolyzate from the pulp. The method further comprises treating the pulp with a second liquor, the second liquor including at least one alkali. The method further comprises refining the pulp.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: August 10, 2010
    Assignee: Packaging Corporation of America
    Inventors: Ventzislav H. Kirov, Anil Sethy, Bryan L. Sorensen
  • Method of manufacturing pulp and articles made therefrom
    Publication number: 20070193706
    Abstract: A method of making pulp adapted to be used in forming corrugating medium is disclosed. The method comprises cooking woodchips in a first liquor in the absence of an alkali addition. The method further comprises mechanically fiberizing the woodchips to form a pulp. The method further comprises separating hydrolyzate from the pulp. The method further comprises treating the pulp with a second liquor, the second liquor including at least one alkali. The method further comprises refining the pulp.
    Type: Application
    Filed: February 21, 2006
    Publication date: August 23, 2007
    Inventors: Ventzislav Kirov, Anil Sethy, Bryan Sorensen
  • Process for removing residual oxygen from oxygen-bleached pulp
    Patent number: 4209359
    Abstract: A method for removing residual oxygen from an aqueous slurry of pulp that has been oxygen-bleached is disclosed. The slurry, usually containing no more than 3 weight percent fiber, is agitated by a radial-flow impeller, which imparts a substantially radial flow to the slurry. If the residual oxygen is not removed, it may degas at an inopportune moment during later processing (for example, washing) and carry some of the wood fibers to the surface of the slurry, thereby forming a foamy mat, which hinders further processing.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: June 24, 1980
    Assignee: International Paper Company
    Inventor: Anil Sethy